78392768 has 14 divisors (see below), whose sum is σ = 155560776. Its totient is φ = 39196352.

The previous prime is 78392761. The next prime is 78392773. The reversal of 78392768 is 86729387.

It is a happy number.

It is a super-2 number, since 2×78392768² = 12290852149403648, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78392761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612380 + ... + 612507.

It is an arithmetic number, because the mean of its divisors is an integer number (11111484).

Almost surely, 2^78392768 is an apocalyptic number.

It is an amenable number.

78392768 is a deficient number, since it is larger than the sum of its proper divisors (77168008).

78392768 is a wasteful number, since it uses less digits than its factorization.

78392768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224899 (or 1224889 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 50.

The square root of 78392768 is about 8853.9690534810. The cubic root of 78392768 is about 427.9818317032.

The spelling of 78392768 in words is "seventy-eight million, three hundred ninety-two thousand, seven hundred sixty-eight".